cmdlet is run then a ‘synchronize now‘ event is marked and the update is not actually run immediately.
The event itself happens the next time abserver looks to see if a sync event has been triggered.
Number of stale device files deleted: 0 Number of device full files written: 1 with 0 total contacts Number of device delta files written: 11 with a total of 0 new/updated contacts and 0 deleted contacts.
Number of device bytes written: 1,657 compressed to 1,248 bytes on disk.
This interval is 1 minute by default and can be customized to any value between 1 second and 24 hours.
The second half of the server-side process is controlled by the Address Book Service which pulls information from the SQL database and writes the changes to the address book files.
In the time it took to read the previous paragraph Lync Server should have synchronized and outstanding changes in Active Directory and Step #2 can be manually processed.